/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jms.example.exclusive.consumer;

import org.apache.activemq.ActiveMQConnectionFactory;

import javax.jms.*;

/**
 * @author <a href="http://www.christianposta.com/blog">Christian Posta</a>
 */
public class Consumer {

	private static final String BROKER_URL = "tcp://localhost:61616";
	private static final Boolean NON_TRANSACTED = false;
	private static final long TIMEOUT = 20000;

	public static void main(String[] args) {
		String url = BROKER_URL;
		if (args.length > 0) {
			url = args[0].trim();
		}
		System.out.println("\nWaiting to receive messages... will timeout after " + TIMEOUT / 1000 + "s");
		ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("admin", "password", url);
		Connection connection = null;

		try {

			connection = connectionFactory.createConnection();
			connection.start();

			Session session = connection.createSession(NON_TRANSACTED, Session.AUTO_ACKNOWLEDGE);
			Queue destination = session.createQueue("test-queue?consumer.exclusive=true");
			MessageConsumer consumer = session.createConsumer(destination);

			int i = 0;
			while (true) {
				Message message = consumer.receive(TIMEOUT);

				if (message != null) {
					if (message instanceof TextMessage) {
						String text = ((TextMessage) message).getText();
						System.out.println("Got " + i++ + ". message: " + text);
					}
				} else {
					break;
				}
			}

			consumer.close();
			session.close();

		} catch (Exception e) {
			System.out.println("Caught exception!");
		} finally {
			if (connection != null) {
				try {
					connection.close();
				} catch (JMSException e) {
					System.out.println("Could not close an open connection...");
				}
			}
		}
	}
}